How to add audio source to gameobject with PlayOnAwake turn on through script?

I have an audio manager script which take in an array of "sounds" (a custom serializable class that has public variables like: AudioClip clip, string name, float pitch,... and bool PlayOnAwake). In the awake function of the manager script for each "sound " i add a audio source and set all of its settings to match the "sound" settings (clip, pitch, ...). It worked fine until i wanted to add the bool PlayOnAwake. For some special audio i want it to play automatically rather then call it manually so i add the PlayOnAwake bool and set the AudioSource to that. But i think because i set it after i add the component to the object so it wouldn't play automately. How to achieve something like this?